Burglar-alarm.



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EUhGLAR ALARM. .anmcnmn mum JAN. 19. 1914] Patented Sept. 22, 1914..

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G-Hiom AA/J short stud 16 depends from the lever.

LXEI: STAHL, OF CHICAGO, ILLINOIS.

BUBGLAR-ALABM.

Specification of Letters Patent.

Patented Sept. 22, 1914.

Application filed January 19, 1914. Serial No. 818,145.

To all whom it may concern:

Be it known that I, AxEL STAHL, a citizen of the United States, residing at Chicago, 1n the county of Cook and State of Illmols, have invented certain new and useful Imrovements in Burglar-Alarms, of which the ollowing is a specification.

This invention relates to burglar alarms characterized by a talking machine which is started to give an alarm in the event of a window or door being opened by an intruder.

The invention has for its object to provide novel and improved means for controlling the talking machine, and tothis end it consists in a combination and arrangement of parts to be hereinafter described and claimed.

In order that the invention may be better understood, reference is had to the accompanying drawing in which- Figure 1 is a perspective view of the apparatus, and Fig. 2 is a cross-section showing a ortion of the controlling mechanism.

eferring specifically to the drawing, 5 denotes an ordinary talking machine having a disk record 6 carried bv a rotating table 7 and engageable by a nee le or stylus carried by a sound-box 8. The usual brake 9 for the table is also provided, said brake being carried by a lever 10 mounted on a pivot stud 11, which latter is mounted on the top of the casing of the machine. On the top of the casing, at the side of the starting point of the needle, is mounted a stud 12 on which is pivoted, to swing in a horizontal plane, a lever 14 having1 a prolongation or finger 15 passing beneat the sound-box and holding the latter elevated a sufficient distance to keep the needle out of contact with the record. Between the finger and the pivo tfha e table 7 has a marginal enlargement forming an abutment or cam 17 into the path of which the stud 16 extends.

A cord 18 is fastened to the brake-lever 10 and carried to the windows and doors ove'r suitable guide pulleys, and fastened to the windows anddoors in such a manner that when an intruder opens the same, the cord is given a pull, and the brake-lever is swung on its ivot to disengage the brake 9 from the periphery or edge of the table. The machine, having reviously been wound u now starts, and w en the cam 17 strikes the stud 16, the lever 14 is swung on its pivot to swing the part 15 from beneath the soundbox 8, whereupon the latter drops and the needle comes into contact with the record 6, and the alarm is given.

The apparatus is very simple in construction and it can be readily and cheapl installed, any ordinary disk talking machine, slightly modified as described, being all that is necessary besides the brake releasing connections 18.

I claim:

The combination with a talkin machine having a sound-box and a turn-tab e for supporting the record, said turn-table having a marginal abutment, of a lever extending horizontally beneath the sound-box and pivoted to swing in a horizontal plane, said lever when in engagement with the sound box holding the same elevated in inoperative position, and a stud depending from the lever, said stud being in the path of the aforesaid abutment.

In testimony whereof I afiix my signature in presence of two witnesses.

AXEL STAHL.

Witnesses:

S. J. LEI-IRER, H. G. BATCHELOR. 

